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B. HIGKMAN, JOINTER ARM FOR FLOWS.

No. 415,866. Patented NOV. 26, 1889.

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UNITED STATES PATENT OFFICE.

EDGAR M. IIICKMAN, OF ALBION, MICHIGAN, ASSIGNOR TO TIIE GALEMANUFACTURING COMPANY, OF SAME PLACE.

JOlNTER-ARM FOR PLOWS.

SPECIFICATION forming part of Letters Patent No. 415,866, dated November26, 1889.

Application filed May 1,1889. Serial No. 309,247. (No model.) v

To all whom it may concern:

Be it known that I, EDGAR M. I-IICKMAN, a citizen of the United States,residing at Albion, county of Calhoun, State of Michigan, have inventeda certain new and useful Improvement in .Iointer-Arms for Flows; and Ideclare the following to be a full, clear, and exact description of thesame, such as will enable others skilled in the art to which it pertainsto make and use the same, reference being had to the accompanyingdrawings, which form a part of this specification.

My invention is designed as an improvement on reissued Letters PatentNo. 6,821, dated December 38, 1875.

In the use of the device described and claimed in the above-named patentgreat difficulty has been experienced in properly adjusting the outerend of the jointer-arm, and consequently the jointer or small plow, in ahorizontal direction, so that its out will be exactly in a verticalplane with the main plow.

The object of this invention is to produce a device by which thishorizontal adjustment may be accomplished.

In the drawings, Figure 1 is a plan view of my device. Fig. 2 is aperspective view showing the relative arrangement of the parts. Fig. 3is a horizontal section. I

In carrying out my invention, A represents the plow-standard, A the jointer orsmall plow, and B is the horizontal arm by which it. is supported.The heel or butt I) of this horizontal arm is made rounded or convex,and is provided with the orifice I).

C is a block, which maybe attached to any suitable part of the plow bythe bolts 0. This block forms the seat for the end I) of the horizontalarm and has one surface 0 concave to fit the convex surface of the arm.The blockis provided with an elongated orifice 0 through which the boltD, used to secure the parts together, may be passed,

E is a washer, against which the nut (1 may bear. This washer is ofcourse not essential,

and may or may not be used.

By making the orifice Z) larger at the inner surface of the arm than atthe on ter the bolt D will have a free horizontal movement therein.

The advantage of securing the arm to the plow beam or standard by thismeans will be apparent. The rounding of the seat of the standard is suchthat the jointer-arm. has a motion about said rounded surface as avertical pivot. This permits, therefore, of the jointer arm beingadjusted horizontally around the standard as a pivot, and by looseningthe bolt it may be raised or lowered bodily on the standard, while thecurved seat holds it rigidly against any tendency to tilt downward aboutthe heel or butt of the jointerarm or to rock laterally about the jointer-arm as an axis. Of course the block C might be dispensed with anda concaved seat be formed integral with the standard when the latteniscast; so, also, if desired, the end of the arm mightbe made concave andits seat made eonvex. As these Would be obvious equivalents of the formherein shown, they would of course be contemplated by my invention.

\Vhat I claim is I The combination, with a plow, of a jointerarmprojecting from itsst-andard, the engaging 'faces of such standard andarm being vertical cylindrical surfaces, bolt orifices through thestandard and the arm on these curved engaging faces, the bolt-orifice inthe jointer-arm flared toward the standard, thereby giving the jointer alateral adjustment with respect to the standard, and means for adjusting said arm vertically along said curved engaging faces,substantially as described.

In testimony whereof I sign this specification'in the presence of twowitnesses.

GAR M. HICKMAN.

\Vitne'sses: A

MONFORT D. WEEKs, EUGENE C. LISTER.

